Human-Powered Vehicle Operating Device With Cam Mechanism
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Solution Overview
Problem
Existing operating devices for human-powered vehicles lack efficiency in generating control signals and electricity, often requiring batteries and complex constructions to activate multiple components simultaneously.
Innovation Solution
The operating device features a base with a first operating member and electric switch that can output multiple control signals through progressive movement, incorporating a cam and follower mechanism to activate the switch multiple times without a battery, and includes a second operating member for independent operation, with integrated electricity-generating elements and a wireless communicator for communication with the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single operating member is used to activate multiple components, then device complexity is reduced, but the ability to generate multiple control signals efficiently is insufficient
Solution Approach 1:
The cam mechanism is designed with multiple lobes that periodically contact the follower during a single rotation of the operating member. This periodic contact causes the electric switch to be activated multiple times (generating multiple control signals) while the operating member completes only one cycle, thereby achieving high productivity with simple device structure.
2Reliability
If batteries are used to power the control signals, then reliable operation is achieved, but weight and device complexity increase
Solution Approach 1:
The operating member itself serves dual purposes: it both operates the vehicle component and generates electrical energy through its motion. The cam-follower mechanism converts the mechanical motion of the operating member into electrical signals that activate the control unit, eliminating the need for external batteries and reducing device weight while maintaining reliable operation.
3Adaptability or versatility
If multiple operating members are used to control different components, then independent control is achieved, but device complexity and space requirements increase
Solution Approach 1:
The single operating member is designed with multi-functionality through the cam mechanism. By varying the cam profile, the same operating member can independently control multiple different components (such as brake, derailleur, or light) by activating the electric switch at different positions during its rotation, thereby achieving versatility without increasing device complexity.
Data Source
AI summary
An operating device is provided for a human-powered vehicle. The operating device basically includes a base, a first operating member and a first electric switch. The first operating member is movably arranged with respect to the base from a first position to a second position. The first electric switch is provided to the base. The first operating member is configured to activate the first electric switch at least two distinct times in response to a progressive movement of the first operating member from the first position towards the second position.